Flanged coupling for conduits



Aug. 4, 1931. c. BENZ FLANGED COUPLING FOR CONDUITS Filed June 27, 1929Patented Aug. 4.1931

UNITED STATES PATENT OFFICE CARL BENZ, OF ZBIESDORF, NEAR BERLIN,GERMANY, ASSIGNOR TO SIEMENS- SCHUCKERTWERK'E AKTIENGESELLSCHAFT, OFBEBLIN-SIEMENSSTADT, GERMANY,

A CORPORATION OF GERMANY ILANGED COUPLING FOR CONDUITB Application filedJune 27, 1929, Serial No.

L ing the lengths together, said flanges being secured on the tubes byvarious means, such for example, as by rolling. No high claims asregards strength can, of course, be made on such joints. Anotherproposal suggests the riveting of flan es provided with rims to the endsof the tu es. This causes a considerable weakening of the material ofthe tubes. Simply welding the flange to the end of the tube is notsatisfactory, as welds must not be subjected to strains.

The above diificulties are effectively eliminated according to myinvention by having a weld serve merely for ensuring a good seal whileproviding other 'means for bearing the strains and stresses.

In reducing my invention to practice the end of the tube to be providedwith a flange may, for instance, be reinforced or thickened to form aperipheral protuberance and a rim on the coupling flange may bevsodisplaced that it fits over the reinforced end of the tube. Thereinforcement of the end of the tube may be effected in various ways. Inmost cases upsetting of the end of the tube is sufficient. Where thetubes are manufactured by the tube rolling process, pilger roll orPerrins process, and if conditions permit the reinforcement may bemachined out of the remaining head. If the tube is of uniform thicknessthroughout and upsetting is to be avoided the end of the tube may beturned up. Since the rim produced in this way does not suffice to securethe flange o steadily enough, a special additional ring is Twoembodiments of my invention are illustrated in-the attached drawings byway of example and described in my specification.

In the drawings 60 -Fig. 1 represents a longitudinal section also beprovided wit 874,213, and in Germany April 17, 1929.

through a flanged coupling on a tube with reinforced end, and

Fig. 2 represents a longitudinal section through a flanged coupling on atube with turned up edge.

Like parts are indicated by like letters of reference in both figures ofthe drawings.

Referring to Fig. l of the drawings, it

will be seen that the tube 1 is provided with a reinforced or thickenedend produced by upsetting in such a wa as to form a protuberant boss. Acoupling flange 2 is joined to the thickened end 3 of the tube 1preferably, by providing the coupling flange with an integral annularportion 2a between which and the end face of the thickened end portion 3is interposed a welded seam 4. The coupling flange 2 is provided with arim 5, hich may be displaced from an original. position shown in dottedlines or otherwise deformed so that it engages or folds over thethickened end portion 3 of the tube and thus avoids stress or strain onthe welded seam or weld 4. This joint has the advantage that the weldedseam is reinforced, by providing considerable increase in the surfaceswhich are welded together. If desired the flange rim 5 may likewise bejoined to the thickened end 3 of the tube 1 by a seam 7.

In Fig. 2 of the drawings is shown a flanged coupling for conduit tubingwhich is substantially similar to that shown in Fig. 1 except that theprotuberance on tube 1 is provided in the form of an out-turned flange 3at the end of said tube. Against the rear face of the rim 3 formed inthis way is placed a ring 6 and this ring is engaged or gripped by theturned down flan rim-5 of the coupling flange 2. As in tfi: caseillustrated in Fi 1, the flange 2 may an annular portion 2a which may bejoined to the broadened tube end 3 by an enlarged seam or weld 4 whichis thus placed between surfaces having a larger area than thecross-section of the tube.

Various modifications and chan es may be made without departing from t espirit and the scope of the invention, and I desire,

therefore that only such limitations shall be placed thereon as arelmposed by the prior art.

I claim as my invention:

5 1. In a flanged coupling for conduit in combination, a tube with a rimformed by turning the end of the tube over, a ring abutting against saidrim a flange, a welded seam between the face of the tube endand saidflange, and a rim on said flange fitting over said ring.

2. In a flanged coupling for conduit in combination, a tube with a rimformed by turning the end of the tube over, a abutting against said rim,a flange, a weld dg seam between the face of the tube end and saidflange, a rim on said flange fitting over said ring, and a welded seambetween said rim and the outer wall of the tube.

3. In a flanged couplingfor conduits, the combination of a tube with anenlarged end, a coupling flange interlocked with said enlarged end andprovided with an inward y-presented annular portion arranged opposite tothe end face of said tube, and

a welded seam betweensaid end face of the tube and said annular portionof the coupling flange.

4. A flanged cou ling for conduits as recited in claim 3, in which saidcoupling flange is provided with a rim interenga'ging with said enlargedend of the tube.

5. In a flanged coupling for conduits, a tube with a peripherallyprotuberant end, a coupling ange provided with an inwardl -presentedannular portion arranged opposite to the end face of said (peripherallyprotuberant end .of the tube an with a rim mterenga g with saidprotuberant end 9' of the tube and a welded seam interposed begeen' saidrim and the outer wall of the 6. In a flanged coupling for conduits, atube rovided with an outwardlyresented end ange, a coupling flangeprovided with integral portions between which said] end flange projects,and a welded seam interposed between the end face of said tube and l(incof said integral portions of the coupling 7. In a device of thecharacter described, the combination with a pipe-section provided with1a gircumferelzntialflprotuberardilce =atoneen,oacoup' an r i' mounted onsaid protub r ance a fld i i ter locked therewith to prevent relativeaxial displacement, and a welded seam between the end face of saidpipe-section and said I no coupling flange In testimony whereof I afiixm signature.-

- GARE BENZ.

